创建动态WEB工程 FormHandling，并添加SpringMVC相关jar包(同Hello world示例一致)，添加DispatcherServlet配置，如下：
web.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> 3 <display-name>FormHandling</display-name> 4 5 <servlet> 6 <servlet-name>FormHandling</servlet-name> 7 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 8 </servlet> 9 <servlet-mapping> 10 <servlet-name>FormHandling</servlet-name> 11 <url-pattern>/</url-pattern> 12 </servlet-mapping> 13 </web-app>
Formhandling-servlet.xml
创建模型对象student.java
1 package com.young.formhandling;
2
3 public class Student {
4 private Integer age;
5 private String name;
6 private Integer id;
7
8 public Integer getAge() {
9 return age;
10 }
11
12 public void setAge(Integer age) {
13 this.age = age;
14 }
15
16 public String getName() {
17 return name;
18 }
19
20 public void setName(String name) {
21 this.name = name;
22 }
23
24 public Integer getId() {
25 return id;
26 }
27
28 public void setId(Integer id) {
29 this.id = id;
30 }
31
32
33 }
创建控制器对象StudentController.java
1 package com.young.formhandling;
2
3 import org.springframework.stereotype.Controller;
4 import org.springframework.ui.ModelMap;
5 import org.springframework.web.bind.annotation.ModelAttribute;
6 import org.springframework.web.bind.annotation.RequestMapping;
7 import org.springframework.web.bind.annotation.RequestMethod;
8 import org.springframework.web.servlet.ModelAndView;
9
10 @Controller
11 public class StudentController {
12
13 @RequestMapping(value = "/student", method = RequestMethod.GET)
14 public ModelAndView student() {
15 return new ModelAndView("student", "command", new Student());
16 }
17
18 @RequestMapping(value = "/addStudent", method = RequestMethod.POST)
19 public String addStudent(@ModelAttribute("SpringWeb") Student student, ModelMap model) {
20 model.addAttribute("name", student.getName());
21 model.addAttribute("age", student.getAge());
22 model.addAttribute("id", student.getId());
23
24 // 渲染result.jsp
25 return "result";
26 }
27 }
添加student.jsp
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 7 <title>Spring MVC表单处理</title> 8 </head> 9 <body> 10 <h2>Student Information</h2> 11 <form:form action="/FormHandling/addStudent" method="post"> 12 <table> 13 <tr> 14 <td><form:label path="name">名字：</form:label></td> 15 <td><form:input path="name"></form:input></td> 16 </tr> 17 <tr> 18 <td><form:label path="age">年龄：</form:label></td> 19 <td><form:input path="age"></form:input></td> 20 </tr> 21 <tr> 22 <td><form:label path="id">编号：</form:label></td> 23 <td><form:input path="id"></form:input></td> 24 </tr> 25 <tr> 26 <td colspan="2"><input type="submit" value="提交表单" /></td> 27 </tr> 28 </table> 29 30 </form:form> 31 </body> 32 </html>
添加result.jsp
1 <%@ page language="java" pageEncoding="UTF-8"%>
2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
3 <html>
4 <head>
5 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6 <title>Spring MVC表单处理</title>
7 </head>
8 <body>
9 <h2>提交的学生信息如下：</h2>
10 <table>
11 <tr>
12 <td>名称：</td>
13 <td>${name}</td>
14 </tr>
15 <tr>
16 <td>年龄：</td>
17 <td>${age}</td>
18 </tr>
19 <tr>
20 <td>编号：</td>
21 <td>${id}</td>
22 </tr>
23 </table>
24 </body>
25 </html>
最后启动tomcat,运行http://localhost:8080/FormHandling/student如下所示：
点击提交表单按钮，显示如下：
这时，发现我们提交的中文名称显示为乱码，我们在控制器类中打印姓名的内容发现，提交到控制器时显示就是乱码：
解决方法如下：
在web.xml文件中添加字符集过滤器：
1 <filter> 2 <filter-name>characterEncodingFilter</filter-name> 3 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> 4 <init-param> 5 <param-name>encoding</param-name> 6 <param-value>UTF-8</param-value> 7 </init-param> 8 <init-param> 9 <param-name>forceEncoding</param-name> 10 <param-value>true</param-value> 11 </init-param> 12 </filter> 13 <filter-mapping> 14 <filter-name>characterEncodingFilter</filter-name> 15 <url-pattern>/*</url-pattern> 16 </filter-mapping>
重新启动tomcat，再次运行，中文显示正常：
注意：此种方法只针对1.jsp页面编码设置为UTF-8；2.form表单提交方式为post，get方式下spring编码过滤器是不起作用的。
时间： 2024-08-10 19:17:38